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<blockquote data-quote="Radioflyer97" data-source="post: 2704285" data-attributes="member: 572356">If your amp is 1500w it will draw 125 amps. If you&#039;re going to run the stereo with the vehicle running, i&#039;d go for the alternator. I think the Impala alternator is based on the Smaller CS130 series alternator and puts out between 80-110 amps. If you want the best possible power from your amp, you need a bigger alternator.You CAN run your amp with what you have, but at greatly reduced power levels. remember your alternator also has to supply power to the rest of the car AND charge the battery. If you run your amp hard all the time, your battery will be constantly drained and your alternator won&#039;t be able to recharge it. your battery will die and eventually your alternator will be fried.If you adjust the gains on your amp to a reaonable level (dropping the amp draw down to say 30% power or roughly 40 amps draw) you should be safe.</blockquote>

[QUOTE="Radioflyer97, post: 2704285, member: 572356"] If your amp is 1500w it will draw 125 amps. If you're going to run the stereo with the vehicle running, i'd go for the alternator. I think the Impala alternator is based on the Smaller CS130 series alternator and puts out between 80-110 amps. If you want the best possible power from your amp, you need a bigger alternator. You CAN run your amp with what you have, but at greatly reduced power levels. remember your alternator also has to supply power to the rest of the car AND charge the battery. If you run your amp hard all the time, your battery will be constantly drained and your alternator won't be able to recharge it. your battery will die and eventually your alternator will be fried. If you adjust the gains on your amp to a reaonable level (dropping the amp draw down to say 30% power or roughly 40 amps draw) you should be safe. [/QUOTE]

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